Sometimes when watching a movie, the sound is awesome, but I have a hard time hearing dialogue. What settings should I be looking at to change that? I have an Elite VSX-23 with Polk Monitor 60's and a Polk CS20 center. I don't notice it as much on this setup as the one in my living room (VSX-03 and the old Sony Towers and Center best buy used to sell). What settings should I be looking at so I can hear the dialogue a bit better?